Reid Harvey wrote: > Ode, Marshall, Mike D., Everybody, > >From what I'm seeing there are at least two very different approaches to > ceramic filter saturation, each with it's own bunch of materials and > methodologies. The two approaches include: #1. that which requires > kiln firing and some upper temperature, and #2. that which is done > without heat, applied to filters that were made without silver > saturation, using room temperature methods. Mike, you helped me > crystalize this understanding with your earlier comments. Now can > someone give ideas that would help expand on possibilities for the > second alternative? Silver nitrate is one #2 approach we've considered, > but it appears a minute amount of the AgCl is disolved within the > filtered water. I'm hopeful someone can suggest ideas for other forms > of silver, that whould be insoluble, nothing to be found in the filtered > water. > > While I feel good about is a number of alternatives in the first > catagory, but I'm less confident of the second. As I mentioned I have a > couple of hundred candles, complete with plastic parts, candles that > were never silver treated. And now I'm concerned about insufficient > Microdyn, concentrated CS with which to saturate these. So at first I > turned to silver chloride as an imagineable alternative. First I > saturated the purifier with AgNO3, then running salt water through the > candles, the ion exchange results in AgCl within the candles, the > nitrate running off. But the problem appears to be a minute amount of > AgCl that comes off in the filtered water, something like 1.0 ppm. > > Marshall, I think you mentioned that silver peroxide is a form of silver > that is altogether insoluble. Would there be a way of applying this, or > some other insoluble form, into the purifier medium?
Unfortunately I do not have the information on silver oxide vs silver peroxide, how each is formed, or the stability of them. > What about silver > iodide or bromide? Both of these are somewhat more soluble than silver chloride. The following are the only silver compounds I can find that are insoluble: silver nitroperoxide silver peroxide Ag2O2 or AgO Ag2P2O2 Ag2Se telluride mineral Ag2Te Tellurite mineral Ag2TeO2 pyrargyrite AgAg3SbS3 I cannot guarantee I got those formula correct, especially the subscripts, they are printed so small I have a hard time reading them. Did you get my message about the possible of using powdered copper, then running silver nitrate through it to plate silver on the outside of the grains? Marshall > Really I'm reaching here, my knowledge of chemistry > not upto it. So I'm reaching, hoping someone can suggest something, > maybe one last alternative prior to collecting observations, this > chapter of the development. > > To reiterate, I hope it is understood that my intention is not to > agrandize myself, rathering seeking work as a ceramist, involved with > water purifiers. It should also be understood that anybody anywhere > could use this published information to begin saturating ceramic > filters, purchased in local markets, after the #2 approach, treating > canldes that have had no prior application of silver. Startup projects > that would purchase local candles and silver saturate them in this way, > provided one were to successfuly apply the silver to market candles, and > having ascertained that the ceramic is of good quality. Rather I intend > publishing this so it's freely available for anyone to use in ceramic > water filter projects. > > Thanks, > Reid > > -- > The silver-list is a moderated forum for discussion of colloidal silver. > > Instructions for unsubscribing may be found at: http://silverlist.org > > To post, address your message to: [email protected] > > Silver-list archive: http://escribe.com/health/thesilverlist/index.html > > List maintainer: Mike Devour <[email protected]>
